Radio apparatus



June17, 1930. Fm ASBURY 1,765,190

RADIO APPARATUS Filed Jan. 12, 1926 W 5' amit Patented June 1.7, 193@ IUNI res

FAWN? RADIO APPARATUS Application filed January 12, 1926. Serial No.80,833.

My invention relates to radio apparatus, particularly to receiving setsemploying plural tuning units, and my object, generally speaking, is toprovide means for operating the tuning units of a receiving setcollectively and individually for the purpose set forth in my copendingapplications 683,756; 687,080

689,388; 690,795; 72,514 and 7:2,8et0.

In most radio receiving sets employing m plural tuning units, each unitis movable substantially the same amount from a position in tune with agiven wave length to a position in tune with any other given wavelength, so. that it is possible to employ an operator common to all ofthe tuning units for moving them collectively substantially equalamounts whereby they will simultaneously be brought substantially intune with any wave length within the receiving capacity of the set. For

various reasons, however, some one or another stantly in driving contactwith the tuning units it is designed to operate and which is tiltable indifferent planes to move the respective tuning units individually andmovable otherwise to move said. units collectively. Also it is mypurpose to provide in combination with such an arrangement means wherebythe adjustment of one unit made by a tilt,- ing movement of the operatorin one plane is maintained while the operator is being tilted in anotherplane to adjust another unit individually, and whereby the adjustmentsof.

companying drawings and defined in the appended claims.

In the drawings, wherein like characters of reference denotecorresponding parts in the different views:

Fig. 1 is a front elevation partly in section, of a plural tuning unitradio receiving set having my improved tuning unit operating meansembodied therein; and

Fig. 2, a section on the line 2-2 of Fig. 1.

In the drawings I have illustrat :d an embodiment of my invention inwhicl an operator is rotatable as well as longitudinally shiftable-toadjust a plurality of tuning units collectively, and which is tiltableto adjust them individually. The tuning units 10, 11 and 12, forconvenience are shown as variable plate condensers, each including astator 11' and a rotor 7) with the rotors mounted. respectively. onshafts 1,3, let. and 15', and the. latter equipped, respectively, withspiral gears 16, 17 and 18. Said condensers are mounted in any suitablemanner, upon a panel board 20' for example, in triangular relativerelation with their rotor shafts parallel to one another and with theirspiral gears 16, 17 and 18 all in the same plane and in mesh with aspiral pinion 31.

Spiral pinion 31 is carried at one end of a shaft 32 which extendsthrough a relatively large opening in panel board 20 and at its otherend is equipped with an operating knob 33 and with a pin 31- as and forthe purpose set forth in my application 72,514. Furthermore, said pinion31 is of material thickness, in fact it preferably is formed of considerable length, so that it not only is rotatable to rotate spiral gears 16,17' and 18 collectively, but is shiftable longitudinally to accomplishthe same purpose, the result beiugthat if it is rocked or tiltedabout a line drawn between its points of contact with any two of thegears 16, 17 and 18', the other gear will be individually rotated whilethe two gears about which it is tilted will, remain stationary. Thus byrotating said pinion rough collective adjustments may be imparted to thethree tuning units and by tilting same individual tine adjustments maybe imparted to said units.

justment of one unit made by a tilting move ment of the pinion in oneplane is maintained while the pinion is being tilted in another plane toadjust another unit individually, and whereby the adjustments of two ofthe units made by tilting movements of the pinion in different planeswill be maintained while the pinion is being tilted in still anotherplane to adjust a third unit individually.

The means referred to includes a bracket 35, mounted on a support such,for example, as panel board 20, and having a hollow cylindrical portion36 the axisof which is at right angles to a line drawn through thepoints of contact of two of the spiral gears with spiral pinion 31. Apin 37 is slidably mounted within cylindrical portion 36 and said pin isrigidly connected by a segmental arm 38 with a second pin 39, the axisof which latter is disposed at right angles to a line drawn through thepoints of contact of another pair of the spiral gears with said pinion.A floatingbra cket 40 includes a hollow cylindrical portion 41 which isslidably mounted on pin 39 and said bracket also includes a secondhollow cylindrical portion 42 the axis of which is disposed at rightangles to a line drawn through the points of contact of the remainingpair of spiral gears with spiral pinion 31., A pin 43 is slidable incylindrical portion 42 and said pin includes an eye 44 at its inner endwhich receives shaft 32 and acts as a support for the latter at a pointspaced from gears 16, 17 and 18. Suitable friction devices such as leafsprings 45, 46 are secured, respectively, to brackets 35v an d 41 andengage, respectively, pin 37 and pins 39 and 43 with substantially equalamounts of friction to hold said pins in slidably adjusted positionswithin their associated cylindrical portions 36, 40 and 42.

As a result of the foregoing arrangement it is apparent that shaft 32 isfree to be rotated. with respect to or to be moved longitudinallythrough eye 44 to rotate'the rotors 5 collectively, and that said shaftis free to be tilted in any rotated or longitudinally shifted positionthereof from any one tilted position to any other tilted position torotate any given rotor individually, eye 44 being moved with said shaftas it is tilted and the pins 37, 39 and 43 slidable in their associatedcylindrical portions 36, 40 and 42, respectively, acting as guides todetermine the proper direction of tilt of's'aid shaft to rotate anygiven rotor inone or another of said pins, Whereas an ab-- normal forcewould be required to tilt said shaft in any other direction.Consequently, if said shaft is tilted for example in the direction ofthe axis of pin 43 to rotate gear 16 individually,said pin 43 willmaintain the proper amount of such tilt, while said shaft is beingtilted in another direction, in the direction of the axis of pin 39 forexample, to rotate gear 17 individually, and if said shaft thereafter istilted in the direction of the axis of pin 37, to rotate gear 18individually, pins 43 and 39 will maintain the first mentioned tiltswhile the latter tilt is being effected.

From the foregoing description considered in connection with theaccompanying drawings, it is believed that the construction, op erationand advantages of my invention will be fully understood. I desire topoint out, however, that various changes and desirable additions may bemade in and to the arrangement shown within the spirit and scope of myinvention as defined in the appended claims.

I claim: I

1. In radio apparatus, a tuning unit a part of which is movable, meansfor moving said movable part including a pair of intermeshing gears oneof which is fixed with respect to said movable part and the other ofwhich constitutes an operator for the one that is fixed to said movablepart, one of said gears having diagonally extending teeth wherebytilting movement of said operating gear is effective to move saidmovable part, and means mounting said operating gear for tiltingmovements.

2. In radioapparatus, a tuning unit a part of which is movable, meansfor moving said movable part including a pair of intermeshing gears oneof which is fixed with respect to said movable part and the other ofwhich constitutes an operator for the one that is fixed to said movablepart, one of said gears having diagonally extending teeth wherebyrotation of said operating gear as well asendwise and tilting movementsthereof are effective to move said movable part, and means mounting saidoperating gear for rotation and for endwise and tilting movements.

3. In radio apparatus, a plurality of tuning units a part of each ofwhich is movable,

a plurality of gears one individual to and fixed with respect to eachmovable part, and a spiral gear in engagement with all of said firstmentioned gears movable to drive them collectively and tiltable to drivethem individually.

4. In radio apparatus, a plurality of tuning units a part of each ofwhich is movable, a plurality of gears one individual to and fixed withrespect to each movable part, a driving gear in engagement with all ofsaid first mentioned gears rotatable to drive them collectively, saiddriving gear having spiral teeth whereby it is tiltable in one directionto drive one of said first mentioned gears individually and in anotherdirection to drive another of said first mentioned gears individually,means -mounting said driving gear for, rotation and for tiltingmovements in different directions,- and means whereby the adjustment ofone unit made by a tilting movement of the pinion in one plane ismaintained while the pinion is being tilted in another plane to adjustanother unit individually.

5. In radio apparatus, a plurality of tuning units a part of each ofwhich is movable, a plurality of gears one individual to and fixed withrespect to each movable part, a driving gear in mesh with all of saidfirst mentioned gears, the toothed connections between said driving gearand each of said first mentioned gears including diagonally extendingteeth, said tuning units being arranged in a circle about said drivinggear whereby the driving gear is tiltable in one plane to drive one ofsaid first mentioned gears individually and in another plane at an angleto the plane of its'first mentioned tilting movement to drive another ofsaid first mentioned gears individually, means mounting said drivinggear for tilting'moven'ients in different planes, and friction means forholding said driving gear against tilting movement in one plane While itis being tilted in another plane.

6. In radio apparatus, a tuning unit a part of which is movable,anoperator in constant driving connection with said movable part havinga plurality of difierent forms of movement, one of which is a tiltingmovement relative to said movable part, to move same, and friction meanscoacting directly with said operator to hold the same in any tiltedposition to which it may be moved.

7. In mechanism of the class described, a pair ofspaced gear wheels, andan intermediate gear wheel between and constantly in mesh with saidfirst mentioned pair of gear wheels, whereby the latter are movablecollectively, said intermediate gear wheel having a shiftable axiswhereby .it is movable to move said first mentioned gear wheelsindividually.

.8. In mechanism of the class described, a

pair of spaced gear wheels, an intermediate gear wheel between andconstantly in mesh with sand first mentioned pair of gear wheels,

by axial rotation thereof and-also movable to adjust them individually.

10. In radio apparatus, more than two adjustable tuning units, and asingle operator constantly connected with all of the units axiallyrotatable to adjust them collectively and tiltable to adjust themindividually.

11. In radio apparatus, a plurality of adjustable tuning units, a singleoperator constantly connected with all of said units rotatable to adjustthem collectively and tiltable to adjust them individually, and frictionmeans resisting tilting movements .of said operator.

12. In radio apparatus, a plurality of adjustable tuning units, a singleoperator con stantly connected with all ofsaid units tiltable to adjustthem individually, and friction means resisting tilting movements ofsaid operator.

13. In radio apparatus, a plurality of adjustable tuning units, a singleoperator movable to adjust them individually, and triction meanscoacting directly with said operator to hold the same in any position itmay be moved in effecting imlividual adjustment of the units.

1a. In radio apparatus, a plurality of ad justable tuning units, asingle operator coustantly connected to all the units and movable toadjust them individually, and friction means coacting directly with saidoperator to hold the same in any position it may be moved in effectingindividual adjustment of the units.

In testimony whereof I hereunto atiix my signature.

- DORSEY F. ASBUR-Y.

